Question

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The longest part of alimentary canal?
The first heart sound?
Acid present in stomach?
The chemicals released by neuron pass a region called?

Answer 1

Small intestine is the longest part of alimentary canal.

"Lubb" sound at the beginning of systole.

Hydrochloric acid is present in stomach

The chemicals released by neuron pass a region called synapse.

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Answer 2

1. The longest part of alimentary canal?
A. Small intestine is the longest part of alimentary canal.
2. The first heart sound?
A. 'Lubb' is the first heart sound.
3. Acid present in stomach?
A. Acid present in stomach is hydrochloric acid.
4. The chemicals released by neuron pass a region called?
A. The chemicals released by neuron pass a region called synapse.

Hope it helps!!